return loc_network_is_subnet(other, self);
}
-LOC_EXPORT struct loc_network_list* loc_network_subnets(struct loc_network* network) {
- struct loc_network_list* list;
+LOC_EXPORT int loc_network_subnets(struct loc_network* network,
+ struct loc_network** subnet1, struct loc_network** subnet2) {
+ int r;
+ *subnet1 = NULL;
+ *subnet2 = NULL;
// New prefix length
unsigned int prefix = network->prefix + 1;
// Check if the new prefix is valid
if (valid_prefix(&network->first_address, prefix))
- return NULL;
-
- // Create a new list with the result
- int r = loc_network_list_new(network->ctx, &list);
- if (r) {
- ERROR(network->ctx, "Could not create network list: %d\n", r);
- return NULL;
- }
-
- struct loc_network* subnet1 = NULL;
- struct loc_network* subnet2 = NULL;
+ return -1;
// Create the first half of the network
- r = loc_network_new(network->ctx, &subnet1, &network->first_address, prefix);
+ r = loc_network_new(network->ctx, subnet1, &network->first_address, prefix);
if (r)
- goto ERROR;
+ return r;
// The next subnet starts after the first one
- struct in6_addr first_address = address_increment(&subnet1->last_address);
+ struct in6_addr first_address = address_increment(&(*subnet1)->last_address);
// Create the second half of the network
- r = loc_network_new(network->ctx, &subnet2, &first_address, prefix);
- if (r)
- goto ERROR;
-
- // Push the both onto the stack (in reverse order)
- r = loc_network_list_push(list, subnet2);
+ r = loc_network_new(network->ctx, subnet2, &first_address, prefix);
if (r)
- goto ERROR;
-
- r = loc_network_list_push(list, subnet1);
- if (r)
- goto ERROR;
+ return r;
// Copy country code
const char* country_code = loc_network_get_country_code(network);
if (country_code) {
- loc_network_set_country_code(subnet1, country_code);
- loc_network_set_country_code(subnet2, country_code);
+ loc_network_set_country_code(*subnet1, country_code);
+ loc_network_set_country_code(*subnet2, country_code);
}
// Copy ASN
uint32_t asn = loc_network_get_asn(network);
if (asn) {
- loc_network_set_asn(subnet1, asn);
- loc_network_set_asn(subnet2, asn);
+ loc_network_set_asn(*subnet1, asn);
+ loc_network_set_asn(*subnet2, asn);
}
- loc_network_unref(subnet1);
- loc_network_unref(subnet2);
+ return 0;
+}
- return list;
+static int __loc_network_exclude(struct loc_network* network,
+ struct loc_network* other, struct loc_network_list* list) {
+ struct loc_network* subnet1 = NULL;
+ struct loc_network* subnet2 = NULL;
+
+ int r = loc_network_subnets(network, &subnet1, &subnet2);
+ if (r)
+ goto ERROR;
+
+ if (loc_network_eq(other, subnet1)) {
+ r = loc_network_list_push(list, subnet2);
+ if (r)
+ goto ERROR;
+
+ } else if (loc_network_eq(other, subnet2)) {
+ r = loc_network_list_push(list, subnet1);
+ if (r)
+ goto ERROR;
+
+ } else if (loc_network_is_subnet_of(other, subnet1)) {
+ r = loc_network_list_push(list, subnet2);
+ if (r)
+ goto ERROR;
+
+ r = __loc_network_exclude(subnet1, other, list);
+ if (r)
+ goto ERROR;
+
+ } else if (loc_network_is_subnet_of(other, subnet2)) {
+ r = loc_network_list_push(list, subnet1);
+ if (r)
+ goto ERROR;
+
+ r = __loc_network_exclude(subnet2, other, list);
+ if (r)
+ goto ERROR;
+
+ } else {
+ ERROR(network->ctx, "We should never get here\n");
+ r = 1;
+ goto ERROR;
+ }
ERROR:
if (subnet1)
if (subnet2)
loc_network_unref(subnet2);
- if (list)
- loc_network_list_unref(list);
-
- return NULL;
+ return r;
}
LOC_EXPORT struct loc_network_list* loc_network_exclude(
return NULL;
}
- struct loc_network_list* subnets = loc_network_subnets(self);
-
- struct loc_network* subnet1 = NULL;
- struct loc_network* subnet2 = NULL;
-
- while (subnets) {
- // Fetch both subnets
- subnet1 = loc_network_list_get(subnets, 0);
- subnet2 = loc_network_list_get(subnets, 1);
-
- // Free list
- loc_network_list_unref(subnets);
- subnets = NULL;
-
- if (loc_network_eq(other, subnet1)) {
- r = loc_network_list_push(list, subnet2);
- if (r)
- goto ERROR;
-
- } else if (loc_network_eq(other, subnet2)) {
- r = loc_network_list_push(list, subnet1);
- if (r)
- goto ERROR;
-
- } else if (loc_network_is_subnet_of(other, subnet1)) {
- r = loc_network_list_push(list, subnet2);
- if (r)
- goto ERROR;
-
- subnets = loc_network_subnets(subnet1);
-
- } else if (loc_network_is_subnet_of(other, subnet2)) {
- r = loc_network_list_push(list, subnet1);
- if (r)
- goto ERROR;
-
- subnets = loc_network_subnets(subnet2);
-
- } else {
- ERROR(self->ctx, "We should never get here\n");
- goto ERROR;
- }
+ r = __loc_network_exclude(self, other, list);
+ if (r) {
+ loc_network_list_unref(list);
- loc_network_unref(subnet1);
- loc_network_unref(subnet2);
+ return NULL;
}
// Return the result
return list;
-
-ERROR:
- if (subnet1)
- loc_network_unref(subnet1);
-
- if (subnet2)
- loc_network_unref(subnet2);
-
- if (list)
- loc_network_list_unref(list);
-
- return NULL;
}
LOC_EXPORT struct loc_network_list* loc_network_exclude_list(